Résumé:
A coupled system of fractional integro-differential equations involv-
ing  Riemann-Liouville  integral  and  Caputo  derivative  is  considered  in  this  paper.
Some existence and uniqueness results are obtained using Banach contraction prin-
ciple.  Other existence results are also studied using Shaefer’s fixed point theorem.
At the end, some illustrative examples are discussed.